Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1980-02-05
1981-11-24
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 59, 277DIG8, F16J 1516, F16J 1544
Patent
active
043020194
ABSTRACT:
A labyrinthine mechanical seal in a bore of a casing for a rotatable shaft which is substantially free of axial forces and mounted for axial movement while carried by bearings in the casing. The seal includes a first group of discs arranged in an axial spaced-apart relation on the rotatable shaft and a second group of discs arranged in a non-rotatable manner at axial spaced-apart locations in the bore of the casing to extend around the shaft and mesh with the first group of discs in a manner of a labyrinth. The axial clearances between the groups of discs is 0.2 millimeter or less and the radial clearance between the groups of discs is only slightly greater than the radial clearance in the bearings. The discs are resilient and consist of hardened steel. Alternatively, the discs of one of the groups consist of hardened steel and the other consists of bronze. If desired, according to a further embodiment, the discs comprising both groups each has an annular groove extending in the side face over substantially half the radial height of the meshing disc portions.
REFERENCES:
patent: 1925898 (1933-09-01), Fritz
patent: 2270927 (1942-01-01), Browne
patent: 2554488 (1951-05-01), Carr
patent: 3477385 (1969-11-01), Tangerman et al.
Eickhoff Maschinenfabrik und Eisengiesserei m.b.H
Murray Thomas H.
Poff Clifford A.
Smith Robert I.
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